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Chemical Kinetics
Quiz 1
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Q.1
Zat yang dapat digunakan untuk bahan bakar pesawat terbang adalah
propana
avtur
kerosin
solar
bensin
Q.2
2 reactants which are dye (0.M) and OH- (1.0 M) reacts to form products. The rate law for this reaction is Rate = k[OH-]x[dye]y
True
False
Q.3
The sum of the exponents to which the molar concentration in the rate law equation are raised is called
Order of reaction
Molecularity of reaction
Speed of the reaction
None of the above
Q.4
Fora reaction,A+B —> Product; the rate law is given by, r =k [ A]1/2 [B]What is the order of the reaction?
1
1.5
2
2.5
Q.5
Consider the following rate law: Rate = k[A]n[B]mHow are the exponents n and m determined?
by using balanced chemical equation
By using the subscripts for the formulas
By educated guess
By experiment
Q.6
Rate = k[A]The rate constant in the rate law above is 0.5 L/mol·s. If the initial concentration of A is 0.1 M, how long will it take for [A] to drop to 0.M?
0.7 s
1.4 s
2.8 s
There is not enough information given.
Q.7
The rate law of the reaction 2N2O5 → 2NO2 + O2 is
r = k[N2O5 ]
r = k[N2O5 ]2
r = k[N2O5 ]0
r = k[NO2]4 [O2]
Q.8
Which of the following are true of reaction rates?I. The overall rate law is determined by the fastest step of a reactionII. The presence of a catalyst will increase the number of molecules entering the transition stateIII. An increase in temperature will increase the rate of a reactionIV. Increasing the concentration of reactants will increase the rate at which products yield
II+III+IV
I+IV
II + III
I+II+III
Q.9
Given the following rate law, rate = k[A]2[B]if [A] were doubled, what must happen to [B] to keep the rate constant?
[B] must quadruple
[B] must double
[B] must be havled
[B] must be quartered
Q.10
A+B →C+D ΔH = -202kj/molHow can above reaction be classified in terms of energy exchange during chemical change?
Combination reaction
Endothermic reaction
Transthermal reaction
Exothermic reaction
Q.11
What is the rate equation of following chemical reaction?2NaOH + H2SO4 → Na2SO4 + 2H2O
Rate = k.[NaOH]2.[H2SO4]
Rate = k.[NaOH].[H2SO4]
Rate = k.[NaOH]2
Rate = k.[NaOH]2.[H2SO4]2
Q.12
What is the degree of the following chemical reaction?4Al + 3O2 → 2Al2O3
4
5
6
7
Q.13
When you double the concentration of this reactant the rate of the reaction doesn't change. It is ______ order
First
Second
Zero
Q.14
Which of the following is expressions represents correctly rate of following reaction?X + Y → Z + Q ΔH = +22kj/mol
Rate = +Δ[X] / Δt
Rate = +Δ[Y] / Δt
Rate = +Δ[Z] / Δt
Rate = -Δ[Q] / Δt
Q.15
When following system is disturbed by addition of Nitrogen gas to the system container how does the system act?H2(g) + l2(g) ↔ 2HI(g)
System shifts product side
System shifts reactant side
System does nothing
Q.16
When following system is disturbed by addition of Hydrogen gas to the system container how does the system act?H2(g) + l2(g) ↔ 2HI(g)
System shifts products side
System shifts product side
System does nothing
Q.17
When following system is disturbed by removing of Hydrogen iodide gas to the system container how does the system act?H2(g) + l2(g) ↔ 2HI(g)
System shifts product side
System shifts reactant side
System does nothing
Q.18
When following system is disturbed by heating the system container how does the system act?H2(g) + l2(g) ↔ 2HI(g) ΔH= -9.6kj/mol
System shifts product side
System shifts reactant side
System does nothing
Q.19
When following system is disturbed by cooling the system container how does concentration of SO3 change?2SO2(g) + O2(g) ↔ 2SO3(g) ΔH= +9kj/mol
Increase
Deacreas
No change
Q.20
When following system is disturbed by addition of Oxygen gas to the system container how does concentration of SO2 change?2SO2(g) + O2(g) ↔ 2SO3(g) ΔH= +9kj/mol
Increase
Deacrease
No change
0 h : 0 m : 1 s
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